reference: 10.5. Customizing Desktop Backgrounds
It is said that using
gsettings set org.cinnamon.desktop.background picture-uri 'file:///opt/corp/background.jpg'to change the desktop wallpaper.
but in centos, there are not any path called 'cinnamon', it is specific in linux. It should be 'gnome' in centos, so the command should be
gsettings set org.cinnamon.desktop.background picture-uri 'file:///opt/corp/background.jpg'
